physical education. n. (Education) training and practice in sports, gymnastics, etc, as in schools and colleges. Abbreviation: PE. physâ²ical educaâ²tion. n. instruction in sports, exercise, and hygiene, esp. as part of a school or college program.
3. Stress/injury. Stress on the tissues or any type of injury in the mouth can cause canker sores. Since the sores are actually tiny ulcers, they can be caused by any kind of hard brushing or eating something that can cause bruises or lead to tissue inflammation in the mouth.
Cold Sores Inside Mouth: How To Treat Cold Sores In Mouth. The cold sores inside mouth are different from the regular cold sores on the exteriors. These are also confused with canker sores but unlike the latter, cold sores are caused from a virus. It is a very common problem to get cold sores inside the mouth, which occur around the lip or cheek areas.